Marco is the youngest member of the group. He usually like to joke around, even when He's fighting the Yeerks. He is like Lance from Voltron because He always has a comment about what He sees. Unfortunately, Her mother is possess by a Yeerk. Everyone think She is dead, but She is possessed. When Elfangor gave the Animorph there powers, Marco was unwilling to accept the power, until His friends told Him it was going to be okay.